Search  for anything...
Mongoose

Mongoose Legion Kids Freestyle Sidewalk BMX Bike, Beginner Riders, Boys and Girls, 16-20-inch Wheels, Hi-Ten Steel Frame, Micro Drive BMX Gearing

    • Based on 4,111 reviews
Condition: New
Checking for product changes
$179.00 Why this price?

Buy Now, Pay Later

As low as $29.83 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Friday, May 16
Order within 15 hours and 16 minutes
Available payment plans shown during checkout

Recently Viewed

Color: Red


Size: 20-Inch Wheels/LSX


Features

  • Legion LXS is the perfect sidewalk cruiser for young riders looking for their first 20 BMX-style bike, rider height recommendation is 40 - 54
  • Durable Hi-Ten steel frame and an 18.2-inch top tube length
  • Single speed drivetrain features a 152mm 1-piece crank with a 36T steel chainring and American loose ball bottom bracket
  • Wheelset features 20 x 2.0 tires mounted on aluminum single wall 36H rims with 3/8 female axle front hub and 16T cog freewheel cassette rear hub
  • Steel linear pull brakes provide precision speed control, while the Hi-Ten steel handlebar and fork are joined by a 36mm stem and threaded headset for quality steering performance

Description

For 45 years, Mongoose has been in the dirt, down the trails, and on the ramps. With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L10 is designed to be a great introduction into the world of BMX. The Legion L10 features a full Hi-Ten steel frame (20” top tube) and removable break mounts. The L10 Hi-Ten steel 8” rise handlebar and 48mm stem are designed for precision riding, while the aluminum single wall 36H rims and 2.25” BMX tires offer grip and durability. The 25x9T gearing with one-piece tubular chromoly 170 mm hollow spindle cranks and American loose ball bottom bracket offer a clean, reliable drivetrains. A steel U-brake with aluminum/resin brake levers provide speed control, while the Hi-Ten steel BMX fork with 1-1/8" threadless steerer helps maximize performance. This bike ships ready to be assembled and comes with a 5-year limited warranty on the frame and a 1-year limited warranty on parts.

Bike Type: BMX Bike


Age Range (Description): Little Kid


Brand: Mongoose


Number of Speeds: 1


Color: Red


Wheel Size: 20 Inches


Frame Material: Alloy Steel


Suspension Type: Rigid


Special Feature: freestyle, Aluminum Frame, BMX


Included Components: Bicycle


Bike Type: ‎BMX Bike


Age Range (Description): ‎Little Kid


Brand: ‎Mongoose


Number of Speeds: ‎1


Color: ‎Red


Wheel Size: ‎20 Inches


Frame Material: ‎Alloy Steel


Suspension Type: ‎Rigid


Special Feature: ‎freestyle, Aluminum Frame, BMX


Included Components: ‎Bicycle


Size: ‎20-Inch Wheels/LSX


Brake Style: ‎Linear Pull


Specific Uses For Product: ‎Trail


Item Weight: ‎27.1 Pounds


Theme: ‎BMX


Style: ‎Lxs


Model Name: ‎Legion Novice


Power Source: ‎Pedal power


Wheel Material: ‎Aluminum


Seat Material Type: ‎Plastic


Assembly Required: ‎Yes


Is Autographed: ‎No


Number of Handles: ‎2


Skill Level: ‎Beginner


Global Trade Identification Number: ‎60


Minimum User Height: ‎48 Inches


UPC: ‎038675158160


Manufacturer: ‎Pacific Cycle, Inc.


Item Package Dimensions L x W x H: ‎47.25 x 22.81 x 8.43 inches


Package Weight: ‎16.56 Kilograms


Brand Name: ‎Mongoose


Warranty Description: ‎5-year limited warranty on the frame and a 1-year limited warranty on parts.


Material: ‎Steel, Other


Suggested Users: ‎unisex-child


Number of Items: ‎1


Part Number: ‎M51809M50OS-PC


Date First Available: July 29, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, May 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Extremely Easy to Assemble. Bike Looks Amazing. M8x1.25 Tap May be Needed.
Color: Orange Size: 20-Inch Wheels/MAG
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
The bike from the pictures looked pretty cool. I didn't realize how beautiful this bike would be until it came in the mail. I purchased the Legion Mag in orange for my 8 year old. It was great to see his reaction on Christmas when receiving this bike. He was so excited. I read some other reviews from reviewers who had complaints on the difficulty of assembling the bike and in my opinion the people having trouble assembling the bike must be blatantly ignorant or illiterate. The instructions for assembly are written so a teenager could assemble this bike, with clearly labeled diagrams and more in depth explanations than what is necessary for assembly. The instructions on assembly are excellent and I had almost no trouble assembling the bike without them until it came to adjusting the brakes. I assembled the entire bike without instructions except for the brakes because it is just self explanatory. I was also able to assemble the brakes without any trouble or needing the instructions although I did refer to them for proper adjustment and alignment protocols. The only issue I had when assembling the bike is when I got to the point of attaching the handlebars to the handlebar binder assembly attached to the stem. The four socket cap screws that tighten down on the handlebar binder bracket would not thread easily. I felt as though I would break the screws or destroy the threads if I attempted to tighten them down far enough to grip the handlebars. There was too much paint in the threaded holes and also the tolerances on the machining of the threads was not great. I have included some pictures showing just how much paint was removed from tapping and also chips from burs in the threaded holes from poor tolerance drilling and tapping at the factory. In order to fix this problem I grabbed a tap handle and a M8x1.25 normal thread tap and tapped the holes. I would give this bike a 4.9 out of 5 if I could just because I needed to tap these holes and a tap was not listed as a required tool. I don't think many people will have problems assembling the bike even if they have this issue and need to tap the four holes as these are the only holes that need anything to be screwed into. Honestly if you don't at the very least know how to use a tap and die set you probably shouldn't be assembling a bike as it's not safe to do so if you're not familiar with basic tools. You could wind up hurting your child from pure negligence if you don't know how to use basic hand tools to assemble this bike properly. My suggestion is that you take it to a local bike shop and pay $30-$40 to have them assemble the bike and adjust the brakes if you don't know what you are doing. I assume some people who buy this bike will do just that with the majority of people knowing how basic hand tools work and them being able to assemble it themselves. Overall the bike is amazing, my son loves it, it was extremely easy to assemble, and I recommend you tap the holes on the handlebar binder even if it doesn't need it as it will allow you to make a more secure connection. Please don't listen to people complaining about difficult assembly as it was extremely easy even the detangler brakes something of which I've never seen or dealt with on a bike before. The instructions are very clear on how to hook the brakes up and how to adjust them properly and I was actually surprised how easy it was to assemble the brakes because I was expecting something very difficult based on the reviews but it turns out these brakes are easier to assemble than normal brakes. ... show more
Reviewed in the United States on December 30, 2020 by Dave Dave
    • Great bike for a 10 yr. old.
Color: Orange Size: 20-Inch Wheels/MAG
My 10 year old grandson loved this bike!
Reviewed in the United States on April 7, 2025 by SMartin
    • Awesome bike, easy to assemble
Color: Red Size: 20-Inch Wheels/LSX
Bike is beautiful, my 8 year olds reaction was priceless. He has a little difficulty with the hand breaks which I adjusted up to make them easier to use. The pedals have little raised teeth for grip, not as sharp as other pedals but they have already made a few scratches on my young riders legs but we are only in his 2nd of riding without me holding the seat and he is still learning. Was deciding between the Legion Freestyle and the Walmart mongoose bike for $50 less and I’m so glad I went with the Legion Freestyle as I believe assembly would have been incredibly more difficult on the Mongoose bike sold at Walmart. Look forward to buying again for my 2 other kids as soon as they are ready. ... show more
Reviewed in the United States on August 3, 2019 by J Younger
    • The breaks in this bike are tricky!
Color: Red Size: 20-Inch Wheels/L10
My son really loves this bike but the only sucky thing is that the brakes failed pretty quickly. It wasn't the pads either it was something to do with the break line itself so we had to buy new brake line kit but they only had like two options on Amazon and we could only use a few pieces from the new kit we bought so that made things even worse. The brakes on this bike are tricky and although it’s been a pretty great bike besides the breaks I would definitely buy something different next time. ... show more
Reviewed in the United States on January 21, 2025 by Elizabeth
    • Great Purchase!
Color: Black/Teal Size: 20-Inch Wheels/L10
I had no previous experience with this brand of bikes before this, but bought this and two others as Christmas gifts. Wow!! My kids love these bikes! Well made, easy to assemble, great value. The first day my kids were ready to ride several miles on these bikes. The thicker tires made it easy to go over multiple types of terrain. Everything is just really well made and put together. Super stoked about this purchase and the two others! ... show more
Reviewed in the United States on December 28, 2024 by E. S.
    • I Will NEVER buy another Mongoose
Color: Orange Size: 20-Inch Wheels/MAG
With all of the four and five star ratings, I must be the problem, right? The bike came partially dissembled for shipping purposes. I expected that. What I did not expect was: 1. Missing parts. One of the nuts and both of the washers were missing from the front wheel. Ok. A shipping problem. But what kind of washers do I need to go find? Should be simple. Just read the instructions. 2. Horrible Instructions: For example, to attach the front wheel, I need to follow the appropriate set of instructions depending if my bike's wheel is, "nutted with step retaining washer, nutted with clip retaining washer or quick release". But I don't know which one my bike is; the nut and both washers are missing. Every section is just like this; follow the set of instructions that pertain to your bike. But where does it say if the bike I purchased has a quill stem, a threadless stem, a front load stem or a top load stem? I have no idea. Mongoose has been around for a while. So there are plenty of videos on YouTube. But there are so many configurations for Mongoose bikes, good luck finding the right one. I watched a bunch of videos, went to Wal-Mart (twice) and got $30 worth of nuts, washers, hex drivers and, no I didn't go out and buy the lithium gel they recommended! Then I paid a bike shop $45 to put the thing together because I still couldn't figure it out. The bike shop wouldn't do the brakes because of liability purposes. But they showed me that I needed to loosen a nut and put the brake cable out some. Should be easy, except... 3. CHEAP parts!: I stripped a nut and two screws trying to tighten the brakes just enough to barely work. It's Christmas Eve and I'm soooo frustrated. Should I be worried? Every single step in the instruction book says that if I don't do this step correctly, someone could get seriously injured or killed. Here ya' go son. Have fun! Merry Christmas. I could call Mongoose Customer Support. They are open Monday through Friday 8 to 5; because that's when dads assemble bikes right? Sorry for all of the venting. I've had the bike for a week and I have to say, I have NEVER had this much trouble assembling something that came in a box. I've got $250 invested into a $170 bike and I don't feel safe letting my son ride it. I am not a happy customer. ... show more
Reviewed in the United States on December 25, 2020 by Jared D.
    • Great quality
Color: Silver/Mag Size: 20-Inch Wheels/MAG
Our 10 year old, very athletic, grandson loves his new bmx. Does all the tricks and track work he wants.
Reviewed in the United States on February 17, 2025 by CocoS
    • Mongoose
Color: Silver/Mag Size: 20-Inch Wheels/MAG
Excellent ítem
Reviewed in the United States on March 18, 2025 by Eddie Latimer

Can't find a product?

Find it on Amazon first, then paste the link below.